Thanks for the lens review. It was one of the pieces of information that pushed me to give the lens a try. And I'm glad I did -- my copy is easily the best zoom lens that I've owned over the decades. I've tried a lot of zooms in the overly-optimistic hope that the image quality would be good enough to support the convenience factor. But, disappointment has usually been the case. The Sony 16-35 f/4 has been a rare exception. This new Sony 24-105 is even more exceptional. My copy is surprisingly good, and hopefully quality-control has improved so that others who try this lens will have a fine copy.